Half to abeam altmayee



(No Model.)

J. W. HUBBER.

SMOKE GONSUMING PURNIAGE. 7 No. 309,226. Patented Dec. 16, 1884;

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H um :1 H v Til W1TNE5EEE. INVENTEIE? Uwrrnn Frames Parent men.

JAMES V. HUBBER, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TOABE-AM ALTMAYER, OF SAME PLACE.

SMOKE CONSUh/HNG FURNACE.

SPECIFICATION forming part of Letters Patent No. 309,226, dated December16, 1884.

Application filed October 3, 1884.

To a whom, it may concern.-

Be it known that I, JAMES W. I'IUBBER, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inSmoke-Oonsuming Engines or Furnaces, of which the follow ing is aspecification.

The object of my invention is to provide a means whereby all or nearlyall of the waste products of combustion-such as the smoke and cindersfrom the furnaces of steam-engines or locomotivesare withdrawn from theSmokestack or chimney and returned to the furnace again to be consumed.I accomplish this object by the means illustrated in the ac companingdrawing, which is a, front elevation of my improved steam boiler furnacepartly broken away.

A is an exhaust-pipe which enters the stack or chimneyjust above thecoupling, with the man-hole at the top of the boiler. The pipe is bent,as shown, and extends upward in the stack or chimney to near the damperB, and is provided with downwardly-projecting tubes, air or smokepassages O, which extend from near the top of the pipe to the bendthereof in an irregular manner, as shown. From the stack the pipe Aextends outwardly to an exhaust or forcing fan, D, to the inner side ofwhich it is connected by a broad funnel-shaped tube, D. Underneath thefan-casing is constructed a chamber, E, which communicates with thefan-chamber and receives all of the smoke and products of combustiondrawn from the smoke stack by the suction fan. From the chamber E apipe, F, is connected, which passes down to near the floor of theash-pit, at which point it is bent inward and enters the center of thefurnace G, just beneath the firegrate. At the termination of this pipeis placed a rose or mushroom cap, H, provided with holes or openings, soas to distribute and give free outlets to the smoke and products ofcombustion into the distributingchamber under the fire-grate.

In order to provide for a more rapid discharge of the smoke and gasesfrom the closed chamber under the grate-bars into the furnace above thefuel, I attach one or more curved pipes, I, at each side of the'furnace,one end (No model.)

of which enters the furnace below the gratebars, and extends upward andpasses through the wall of the furnace above the grate-bars into thecombustion-chamber, as shown. By this means, if the volume of smoke,gases, &c., received into the chamber beneath the gratebars through theforcing-pipe F be too great, the branch pipes at the sides of thefurnace will give relief and carry off the surplus up and into thecombustionchambeiz,

The operation will be as follows, to wit: The doors of the furnace andchamber beneath the grate-bars are closed air tight, or nearly so, andthe fan set in motion, which draws the fumes, smoke, 850., from thefurnace up into the short tubes or openings into the suction or inletpipe, and on into the fanchamber beneath the fan. From thence it isforced on and down the outlet-pipe into the chamber beneath the grate,and up through the fire-grate and branch pipe into the furnace to beconsumed. Thus it will be seen that a suction and forcing operation iscontinuously going on, and but little if any of the waste products ofcombustion-such as the cinders and smokeare allowed to escape throughthe smoke-stack, while a sufficient draft is constantly supplied to thefuel-chamher to promote and keep up combustion.

Having thus described myinvention, what I claim, and desire to secure byLetters Patent, 1s-

1. In a sinokeconsu min g engine or furnace, the inlet or suction pipeentering the smoke stack or chimney, and provided withdownwardly-projecting holes or openings, and ter minating in a broadfunnel connected to the fan-blower,substantially as described.

2. In a smoke-consuming furnace or engine, the exhaust-pipe A, havinginlets (l at the end which entersthe smoke-stack, and terniinating atits other end in a funnel, D, in combination with the fan D, chamber E,and pipe F, having rose I-I, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand andseal.

JAMES 1V. HUBBER. [L. s.]

\Vitnesses:

O. W. M. SMITH, CHAS. E. KELLY.

